Finding the Fourth Proportional to 8,761.02, 12,090.22 and 5,617.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,761.02 : 12,090.22 = 5,617.20 : x
2. Step 2: Convert to fraction form
   8,761.02/12,090.22 = 5,617.20/x
3. Step 3: Cross multiply
   8,761.02x = 12,090.22 × 5,617.20
4. Step 4: Simplify right side
   8,761.02x = 67,913,183.78
5. Step 5: Solve for x
   x = 67,913,183.78/8,761.02
6. Step 6: Final answer
   x = 7,751.74